Microstructure and CTD/LADCP measurements from the Western Mediterranean basin east of $5^{\circ }E$ revealed two types of dynamical regions (Ferron et al., 2017), contrasted in terms of current magnitude, vertical shear, stratification and turbulent kinetic energy dissipation rate: energetic regions (Corsica Channel, Egadi Valley and Sicily Channel) and quiescent regions (Ligurian Sea, around Sardinia, and Tyrrhenian Sea). On average, the current speed and the buoyancy frequency in the energetic regions were twice as large as in the quiescent regions, and the vertical shear was five times as large. Turbulence properties inferred from the microstructure measurements were also contrasted, dissipation rates in the energetic regions being two orders of magnitude larger than in the quiescent regions. The present study investigates the variability of the dissipation flux coefficient, a measure of the mixing efficiency, in a rich assortment of dynamical regimes. This dataset covers the full range of turbulence intensities observed in previous studies based on field measurements, direct numerical simulations, and laboratory experiments alike. The dependency of the dissipation flux coefficient as a function of turbulence intensity for the quiescent and energetic regions frames the previously observed lower and upper bounds, respectively. A contrasting behaviour was revealed between the two types of regions. In the quiescent regions, the dissipation flux coefficient linearly decreases on average by one order of magnitude with turbulence intensity increasing by four orders of magnitude. On the other hand, in the energetic regions the dissipation flux coefficient exhibits a nearly constant value over 4 decades of turbulence intensity, before decreasing for very strong turbulence intensities. In contrast with other studies, this dataset shows no relationship between the Richardson number and the dissipation flux coefficient. This may be due to inadequate vertical sampling resolution of the currents, or to the high diversity of sampled turbulent regimes, contrary to previous studies focused on a single type of dynamical region or framework (such as the thermocline or shear instabilities).

西地中海盆地以东的显微组织和CTD / LADCP测量 $5^{\circ }E$揭示了两种类型的动态区域（Ferron等，2017），在电流强度，垂直剪切，分层和湍动能耗散率方面形成对比：高能区域（科西嘉海峡，埃加迪谷和西西里海峡）和静态区域（利古里亚）海，撒丁岛和第勒尼安海周围）。平均而言，高能区的电流速度和浮力频率是静态区的两倍，而垂直剪切力则是静态区的五倍。还对比了从微观结构测量得出的湍流特性，高能区的耗散率比静态区大两个数量级。本研究调查了耗散磁通系数的可变性（一种衡量混合效率的方法），在各种各样的动力机制中。该数据集涵盖了基于野外测量，直接数值模拟和实验室实验等以往研究中观察到的所有湍流强度。静态和高能区的耗散通量系数与湍流强度的函数关系分别构成了先前观察到的下限和上限。两种类型的区域之间表现出相反的行为。在静态区域中，耗散通量系数平均线性降低一个数量级，而湍流强度则增加四个数量级。另一方面，在高能区，耗散通量系数在4个十年的湍流强度中表现出几乎恒定的值，在减小湍流强度之前减小。与其他研究相反，该数据集显示Richardson数与耗散通量系数之间没有关系。这可能是由于电流的垂直采样分辨率不足，或者是由于采样的湍流状态的多样性高，与先前针对单一类型的动态区域或框架（例如，温跃层或剪切不稳定性）的研究相反。